#
mainmenu "Buildroot $BR2_VERSION Configuration"
config BR2_HAVE_DOT_CONFIG
bool
default y
config BR2_VERSION
string
option env="BR2_VERSION_FULL"
source "target/Config.in.arch"
menu "Build options"
menu "Commands"
config BR2_WGET
string "Wget command"
default "wget --passive-ftp -nd -t 3"
config BR2_SVN
string "Subversion (svn) command"
default "svn"
config BR2_BZR
string "Bazaar (bzr) command"
default "bzr"
config BR2_GIT
string "Git command"
default "git"
config BR2_ZCAT
string "zcat command"
default "gzip -d -c"
help
Command to be used to extract a gzip'ed file to stdout.
zcat is identical to gunzip -c except that the former may
not be available on your system.
Default is "gzip -d -c"
Other possible values include "gunzip -c" or "zcat".
config BR2_BZCAT
string "bzcat command"
default "bzcat"
help
Command to be used to extract a bzip2'ed file to stdout.
bzcat is identical to bunzip2 -c except that the former may
not be available on your system.
Default is "bzcat"
Other possible values include "bunzip2 -c" or "bzip2 -d -c".
config BR2_TAR_OPTIONS
string "Tar options"
default ""
help
Options to pass to tar when extracting the sources.
E.g. " -v --exclude='*.svn*'" to exclude all .svn internal files
and to be verbose.
endmenu
config BR2_DL_DIR
string "Download dir"
default "$(TOPDIR)/dl"
help
Directory to store all the source files that we need to fetch.
If the Linux shell environment has defined the BUILDROOT_DL_DIR
environment variable, then this overrides this configuration item.
The default is $(TOPDIR)/dl
config BR2_HOST_DIR
string "Host dir"
default "$(BASE_DIR)/host"
help
Directory to store all the binary files that are built for the host.
This includes the cross compilation toolchain when building the
internal buildroot toolchain.
The default is $(BASE_DIR)/host
menu "Mirrors and Download locations"
config BR2_PRIMARY_SITE
string "Primary download site"
default ""
help
Primary site to download from. If this option is set then buildroot
will try to download package source first from this site and try the
default if the file is not found.
NOTE: This only works for packages using the Makefile.autotools.in
config BR2_BACKUP_SITE
string "Backup download site"
default "http://sources.buildroot.net/"
help
Backup site to download from. If this option is set then buildroot
will fall back to download package sources from here if the
normal location fails.
config BR2_SOURCEFORGE_MIRROR
string "Sourceforge mirror site"
default "kent"
help
Sourceforge has a system of mirror sites. Some sites may be
closer to your location, and sometimes mirror sites go down
and are no longer available. This option allows you to select
your preferred Sourceforge mirror site.
The list of mirrors is available here:
http://sourceforge.net/apps/trac/sourceforge/wiki/Mirrors
config BR2_KERNEL_MIRROR
string "Kernel.org mirror"
default "http://www.kernel.org/pub/"
help
kernel.org is mirrored on a number of servers around the world.
The following allows you to select your preferred mirror.
Have a look on the kernel.org site for a list of mirrors, then enter
the URL to the base directory. Examples:
http://www.XX.kernel.org/pub (XX = country code)
http://mirror.aarnet.edu.au/pub/ftp.kernel.org
config BR2_GNU_MIRROR
string "GNU Software mirror"
default "http://ftp.gnu.org/pub/gnu"
help
GNU has multiple software mirrors scattered around the world.
The following allows you to select your preferred mirror.
Have a look on the gnu.org site for a list of mirrors, then enter
the URL to the base directory. Examples:
http://ftp.gnu.org/pub/gnu
http://mirror.aarnet.edu.au/pub/gnu
config BR2_DEBIAN_MIRROR
string "Debian Software mirror"
default "http://ftp.debian.org"
help
Debian has multiple software mirrors scattered around the world.
The following allows you to select your preferred mirror.
Usually, just add your country code like XX here:
http://ftp.XX.debian.org
endmenu
config BR2_JLEVEL
int "Number of jobs to run simultaneously"
default "2"
help
Number of jobs to run simultaneously
config BR2_CCACHE
bool "Enable compiler cache"
help
This option will enable the use of ccache, a compiler
cache. It will cache the result of previous builds to speed
up future builds. The cache is stored in
$HOME/.buildroot-ccache.
config BR2_DEPRECATED
bool "Show packages that are deprecated or obsolete"
help
This option hides outdated/obsolete versions of packages.
config BR2_ENABLE_DEBUG
bool "build packages with debugging symbols"
select BR2_PACKAGE_GDB_SERVER
help
Build packages with debugging symbols
enabled
if BR2_ENABLE_DEBUG
choice
prompt "gcc debug level"
default BR2_DEBUG_2
help
Set the debug level for gcc
config BR2_DEBUG_1
bool "debug level 1"
help
Debug level 1 produces minimal information, enough
for making backtraces in parts of the program that
you don't plan to debug. This includes descriptions
of functions and external variables, but no information
about local variables and no line numbers.
config BR2_DEBUG_2
bool "debug level 2"
help
The default gcc debug level is 2
config BR2_DEBUG_3
bool "debug level 3"
help
Level 3 includes extra information, such as all the
macro definitions present in the program. Some debuggers
support macro expansion when you use -g3.
endchoice
endif
choice
prompt "strip"
default BR2_STRIP_strip
help
Select whether to strip binaries and libraries for the target
or not.
strip is the normal strip command
sstrip is a strip that discards more than the normal strip
none do not strip (only for debugging!)
config BR2_STRIP_strip
bool "strip"
depends on !BR2_ELF2FLT
help
strip is the normal strip command
config BR2_STRIP_sstrip
bool "sstrip"
select BR2_PACKAGE_SSTRIP_HOST
depends on !BR2_ELF2FLT
help
sstrip is a strip that discards more than the normal strip
config BR2_STRIP_none
bool "none"
help
none do not strip (only for debugging!)
endchoice
choice
prompt "gcc optimization level"
default BR2_OPTIMIZE_S
help
Set the optimization level for gcc
config BR2_OPTIMIZE_0
bool "optimization level 0"
help
Do not optimize. This is the default.
config BR2_OPTIMIZE_1
bool "optimization level 1"
help
Optimize. Optimizing compilation takes somewhat more time,
and a lot more memory for a large function. With -O, the
compiler tries to reduce code size and execution time,
without performing any optimizations that take a great deal
of compilation time. -O turns on the following optimization
flags: -fdefer-pop -fdelayed-branch -fguess-branch-probability
-fcprop-registers -floop-optimize -fif-conversion
-fif-conversion2 -ftree-ccp -ftree-dce -ftree-dominator-opts
-ftree-dse -ftree-ter -ftree-lrs -ftree-sra -ftree-copyrename
-ftree-fre -ftree-ch -funit-at-a-time -fmerge-constants
-O also turns on -fomit-frame-pointer on machines where doing
so does not interfere with debugging.
config BR2_OPTIMIZE_2
bool "optimization level 2"
help
Optimize even more. GCC performs nearly all supported optimizations
that do not involve a space-speed tradeoff. The compiler does not
perform loop unrolling or function inlining when you specify -O2.
As compared to -O, this option increases both compilation time and
the performance of the generated code. -O2 turns on all optimization
flags specified by -O. It also turns on the following optimization
flags: -fthread-jumps -fcrossjumping -foptimize-sibling-calls
-fcse-follow-jumps -fcse-skip-blocks -fgcse -fgcse-lm
-fexpensive-optimizations -fstrength-reduce -frerun-cse-after-loop
-frerun-loop-opt -fcaller-saves -fpeephole2 -fschedule-insns
-fschedule-insns2 -fsched-interblock -fsched-spec -fregmove
-fstrict-aliasing -fdelete-null-pointer-checks -freorder-blocks
-freorder-functions -falign-functions -falign-jumps -falign-loops
-falign-labels -ftree-vrp -ftree-pre
Please note the warning under -fgcse about invoking -O2 on programs
that use computed gotos.
config BR2_OPTIMIZE_3
bool "optimization level 3"
help
Optimize yet more. -O3 turns on all optimizations specified by -O2
and also turns on the -finline-functions, -funswitch-loops and
-fgcse-after-reload options.
config BR2_OPTIMIZE_S
bool "optimize for size"
help
Optimize for size. -Os enables all -O2 optimizations that do not
typically increase code size. It also performs further optimizations
designed to reduce code size. -Os disables the following optimization
flags: -falign-functions -falign-jumps -falign-loops -falign-labels
-freorder-blocks -freorder-blocks-and-partition -fprefetch-loop-arrays
-ftree-vect-loop-version
endchoice
config BR2_PREFER_STATIC_LIB
bool "prefer static libraries"
help
Where possible, build and use static libraries for the target.
This potentially increases your code size and should only be
used if you know what you do.
The default is to build dynamic libraries and use those on
the target filesystem.
WARNING: This is highly experimental at the moment.
config BR2_HAVE_DOCUMENTATION
bool "documentation on the target"
help
Install the documentation, including manual pages and info
pages, on the target.
If you say n here, your target will not contain any
documentation.
config BR2_HAVE_DEVFILES
bool "development files in target filesystem"
help
Install headers and static libraries in the
target filesystem
endmenu
source "toolchain/Config.in"
source "target/generic/Config.in"
source "package/Config.in"
source "fs/Config.in"
source "boot/Config.in"
source "linux/Config.in"